Question

ajutatima la ex 7 va rog!

Answer 1

7).  a). x + 3/10 = 7/10
x = 7/10 - 3/10 
x = 4/10
b). x + 3/10 = 3/2
x= 3/2 ( amplificat cu 5) - 3/10
x = 15/10 - 3/10
x = 12/10
x = 6/5
c). x + 3/10 = 3/5
x = 3/5 ( amplificat cu 2 ) - 3/10
x = 6/10 - 3/10 
x = 3/10
d). x+ 3/10 = 1 pe langa 3/10
x + 3/10 = 1×10+3/10
x = 30/10 - 3/10
x = 37/10
e). x+3/10 = 2 pe langa 1/15
x+ 3/10 = 2×15+1/15
x = 31/15 (amplificat cu 2)  - 3/10 ( amplificat cu 3 ) 
x = 62/30 - 6/30
x = 56/30
x = 28/15